Pinpoint Tests - OSC Equipped Vehicle

Pinpoint Tests - OSC Equipped Vehicle





Any time an electrical connector is disconnected, inspect the connector terminal condition for corrosion and contamination. Also inspect the connector seal for damage. Clean, repair or install a new component as required.

Pinpoint Test

Refer to Wiring Diagram Set 29, Transmission Controls for schematic and connector information. Diagrams By Number


PINPOINT TEST A: SYSTEM VOLTAGE LOW

NOTE: Refer to Transmission Vehicle Harness illustration within the Transmission Connector Layouts Transmission Connector Layouts procedure.

NOTE: Read and record all DTCs.

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A1 CHECK FOR DTCs


- Connect the scan tool.
- Ignition ON.
- Check for DTC P0562.
- Is DTC P0562 set?

Yes
GO to A2.

No
REFER to Charging System Testing and Inspection.

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A2 CHECK BATTERY VOLTAGE


- Measure the voltage across the battery terminals. Record the measurement.




- Is the voltage greater than 10.5 volts?

Yes
GO to A3.

No
REFER to Charging System Testing and Inspection.

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A3 CHECK CHARGING SYSTEM


- Start the engine.
- Bring the engine up to normal operating temperature and allow the engine to idle.
- Is the generator/check engine lamp off?

Yes
GO to A4.

No
REFER to Charging System Testing and Inspection.

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A4 CHECK CHARGING SYSTEM


- Ignition ON.
- With the engine running, increase the engine speed to 2,000 rpm and observe the scan tool VPWR TCM PID.
- Is the system voltage between 13 volts and 15 volts?

Yes
GO to A5.

No
REFER to Charging System Testing and Inspection.

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A5 CHECK CIRCUIT CBB55 (VT/OG) FOR BATTERY VOLTAGE


- Ignition OFF.
- Disconnect: Transmission C1548.
- Measure the voltage between transmission C1548-9, circuit CBB55 (VT/OG), harness side and ground.




- Is the voltage greater than 10.5 volts?

Yes
REPLACE the mechatronic assembly. REFER to Mechatronic Assembly Service and Repair. Program the mechatronic assembly with the latest calibration. CLEAR all DTCs. TEST the system for normal operation.

No
REMOVE and INSPECT fuse 54 (5A). If the fuse is blown, REPAIR circuit CBB55 (VT/OG) for a short to ground. If the fuse is good, REPAIR circuit CBB55 (VT/OG) for an open. CLEAR the DTC. TEST the system for normal operation.

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